From the outset of the Second World War, it had been clear to Britain that air superiority would be the decisive factor in the battle against Hitler's Germany. At airbases all over England and in the skies over Europe, more than 50,000 Canadian airmen served in the campaign to bomb Germany. Ordered to drop their payloads on a remote and faceless enemy below, the airmen of Bomber Command had a thankless job. For those who survived, the sheer terror and sense of helplessness left an indelible scar.